Online casinos implement self-exclusion programs by allowing players to voluntarily restrict their access to gambling platforms for a specified period, which can range from months to multiple years. This process typically involves an easy, user-friendly interface on the casino's website where players can request self-exclusion by filling out a form or contacting customer support. Once activated, their accounts are temporarily or permanently closed, and they are prevented from logging in or receiving promotional materials. Many casinos also participate in national self-exclusion programs or databases that share information across multiple operators, ensuring that a player's self-exclusion is recognized and enforced across the industry.